Boeing 737

What is GPWS on Boeing 737? (Ground Proximity Warning System)

What is TPMU on Boeing 737? (Tire Pressure Monitor Unit)

What is CTL on Boeing 737? (Control)

What is TDX on Boeing 737? (Torque Differential Transmitter)

What is SEL on Boeing 737? (Select)

What is BRT on Boeing 737? (Bright)

What is TURB on Boeing 737? (Turbulence)

What is AI on Boeing 737? (Anti–Ice)

What is PFC on Boeing 737? (Primary Flight Computers)